Consider a relation schema R = {A, B, C, D, E, G} and its functional dependency set F = {A → BCD,BC →DE,B → D,D → A}. Compute B+and choose the answer. (a) B+= AB (b) B+= ABC (c) B+= ABCD (d) B+= ABCDE (e) none of the above

Q: Primary key of this relation is AB. What is the normal form of this relation given the following…

A: Given all attributes are atomic, hence it is in first normal form.   Primary Key is AB. So prime…

Q: 3. Disprove the following rule: {B > CD, AB → E, E → C} |= {AE → CD} To disprove a rule, construct a…

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Q: Given the functional dependency (A, B) C and BCthen it is true that AC O True O False

A: It is False

Q: Exercise 3.2.1: Consider a relation with schema R(A, B, C, D) and FD’s AB → C, C → D, and D → A. a)…

A: Answer : For the single attributes we have {A}+= A, {B}+= B, {C}+= ACD, and {D}+=AD. Thus, the only…

Q: Consider the following functional dependencies for a relation R(A, B, C, D) A -> (B, C, D), (A, D)…

A: Given relation with functional dependencies is: R(A, B, C, D) A -> (B, C, D), (A, D) -> (B, C)…

Q: Let R(A,B,C,D,E,F,G) be a relation with the FDs: F= (CDG, DG-C, AD-G, G-A, AB-F). Consider the…

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Q: Consider a relation R(A,B,C,D,E) with functional dependencies AB→C, A→D, and D→E. (a) What are…

A: (A ) keys for relation R) is AB   Reason : -- because key is column or set of columns using that you…

Q: 1. Given a relation model R, where U = {A, B, C, D, E}, F = {A->BC, C->D, BC->E, E->A}. The…

A: Note:- Please send the question once again if you wish to answer another question, as set out in the…

Q: QUESTION 8 Here's a relation (R), its attributes, and its functional dependencies (F): R(A, B, C, D,…

A: A functional dependency is defined as if in a relation A→B , the values in attribute A have the same…

Q: Now start with these functional dependencies: АВ > Е C → D F → GH FG → GH В > FG Find a minimal…

A: A) AB ->E, C->D, F->GH, FG->GH, B->FG Here in FD FG->H, we can delete G from RHs…

Q: Write the relation matrix for the relation R on the set (a,b.c.d,e.f) which is defined as follows:…

A: Relation Matrix: Any relation can be represent using the matrix representation. The matrix contain…

Q: Given the relation R (A, B, C, D, E) and the following set of functional dependencies: F = {ABC,…

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Q: 1.) Let R be a relation defined on the set Z by aRb if a < b. What property/properties are violated?…

A: Question 1: The Reflexive Property of a relation states that for every (x,x) belongs to relation R…

Q: A decomposition of a relation R into Rị and R2 is dependency preserving, if - (a) R can be…

A: Answer: The correct option is “(d) All of them”

Q: Consider a relation schema R = {A, B, C, D, E} and its functional dependency set F = {A → B,CD → E,B…

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Q: Consider a relation consisting of the attributes A, B, C, with the following set of functional…

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Q: Consider a relation schema R = {M, N, P, Q, S} and its functional dependency set F = {N → Q,S → M,M…

A: Given: R = {M, N, P, Q, S} F = {N → Q, S → M, M →P, P → S}   Rule to find Super Key in a relation…

Q: Let's suppose, a relation R=(A, B, C, D, E. H) with a set of functional dependencies F: (AE->BC, B…

A: Functional dependency is a DBMS concept . In this attributes of relations  are dependent on each…

Q: Consider a relation schema R = (X, Y, Z) on which the following functional dependencies hold: {XY →…

A: Here in this question we have given a relation schema R = (X, Y, Z) on which the following…

Q: Let W(A, B) and Q(C,D) be two relation schemas. Let r₁ and r2 be the corresponding relation…

A: In the Referential integrity constraints, if a foreign key in table 1 refers to the primary key of…

Q: {u,d,e,f,w}, y,c,d,e,f}}. -Y,C,d,e

A: Given relation R have attributes u,y,c,d,e,f and w and  {y,c} and {w} are two keys. so that the…

Q: 3. Consider a relation R from X={1,2,3,4} to Y={a,b,c,d). R= {(1,b), (2,c), (2,d), (3,c), (4,a) }…

A: In this question we have to consider the relation R from  X = {1, 2, 3, 4} to Y={a, b, c, d} R =…

Q: Assume a relation schema R(a, b, c, d, e, f) with primary key (a, b) and the following full func-…

A: Functional Dependencies:- Functional dependencies are the result of the interrelationship between…

Q: six attributes A, B, C, unctional CR→DADFC-

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Q: Consider the functional dependency of relation R (A, B, C,D) F%3D {A—ВС, В-С, А —В, АВ—D; Compute…

A: Closure Sets Of F+ is all three sets and closure of B+ is second one( in bold) {A}+= {A,B,C,D} {B}+=…

Q: Consider the universal relation R (A, B, C, D, E, F, G} and the set %3! of functional dependencies F…

A: The Relation given is : R = { A, B, C,D ,E, F, G} And the functional dependencies are: B,C --&gt; A…

Q: Given the reation R (A, B, C, D , E), with functional dependencies: A, B -> C D, E -> C B -> D…

A: We have a relation R(A,B,C,D,E) and we have to decompose it into BCNF and check dependency…

Q: find the no. of F-D'S 2-attributes? in F-closure (F+) for a relation with

A: No of f.d's in fcloser(f+) for a relation: given  we have find it for 2 attributes so take…

Q: Q2: Given relation R with attributes (A, B, C, D, E, F). Give all the keys of R if the functional…

A: Given relation R(A, B, C, D, E, F)   Functional Dependencies: AB → C,  CD → E,  E → F   A, B, D do…

Q: QUESTION 6 Consider the following functional dependencies for a relation R(A, B, C, D) A -> (B, C,…

A: A super key whose any proper subset is not super key is called candidate key.   closure table : (A)+…

Q: Given a relation R(W, X, Y, Z) and Functional Dependency set PQ = { WX -> YZ, X->Y }, determine…

A: According to the information given:- We have to define the given relation R(w,x,y,z) and functional…

Q: c. For a schema R (A, B, C, D) bearing FDs F={A B, B + C, C + D, D + A}, find if the decomposition…

A: for dependency preserving, F1 U F2 = F where F1 is the functional dependency of R1 F2 is the…

Q: Consider a relation schema R ={A, B, C, D, E, G} and its functional dependency set F={A → BCD,BC…

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Q: Consider the universal relation: R = (A, B, C, D, E, F, G, H, I, J) and the set of functional…

A: A crucial step in relational database architecture is database normalization, which entails breaking…

Q: Identify all the functional dependencies in the following relation with columns A, B, C, and D…

A: a.A→B : doesn't hold. Since values that repeats in A doesn't have same value in B b.A→C : doesn't…

Q: B, C, D, E, G, H}, satisfying the functional dependencies F = {E → G, E → H, G → H, A → BC, BC → D,…

A: As per answering guidelines, solving the first 3 question completely.  A)  E → G, E → H, G → H, A →…